My 2 cents on car covers and some weather/climate conditions. Doesn't apply to every situation, but some things to think about:
Had a nice expensive cover for outside use, elastic ends, tie-down, etc., and certain times when the wind blew hard, sand and fine dirt would get under the cover between the cover and the car, and the wind would whip the cover, puff it up, and it would flap against the paint. Slowly over time this would abrade the paint by scratching it with the fine dust and grit. Some areas of the car like corners would see a very fine "sanding" on the finish. While some of the Arabian sand can be very fine powder and maybe not be a problem or have a lack of wind, but if in a region where there is blowing dirt, grit, sand, perhaps a cover is not wise when a nice paint job is important.
In moist humid areas mold can develop under even the best "breathable" covers. Nothing is ever perfect, and short of having an enclosed garage, a cover can help. Just be cautious that there can be downsides in some cases, and maybe only use a cover at certain times and conditions.